Motor end cap fixed by positioning pins and method

Abstract

The invention provides a motor end cap fixed by positioning pins and a method. According to the scheme, the motor end cap, the positioning pins, a stator punch and positioning holes are used. The end cap has a supporting effect; a plurality of positioning holes are uniformly distributed in the end cap; the stator punch also has a supporting and fixing effect; positioning holes are also uniformly distributed in the stator punch; the number of the positioning holes of the stator punch is the same with that of the positioning holes of the end cap; and the positioning pins enter the positioning holes of the motor end cap and the positioning holes of the stator punch (3) in a punching manner. The motor end cap is simple in structure and convenient to operate; the motor end cap and the stator punch are machined into required structures; and the positioning pins are punched into the positioning holes of the motor end cap and the positioning holes of the stator punch by effects of an external power source, so that the motor end cap and the stator punch are fastened together in a punching manner. Materials are saved, the assembling efficiency of a motor is improved, the machining cost is reduced, the coaxility and the accuracy of the motor can be ensured after the motor is assembled, electromagnetic air gas of the motor are uniform, and noises are small.

Description

technical field [0001] The invention relates to the field of electric vehicle motors, in particular to a motor stator stamping and a motor end cover installation method fixed by positioning pins. Background technique [0002] Existing industrial fields, including the field of electric vehicles, require a large number of motors. The traditional motor assembly method is mainly installed by means of screws and end caps. The traditional screw motor assembly operation is to pass the screw through the end cover hole, put on the flat washer, spring washer, and nut. The dimensions of these four parts are relatively small, and it is extremely difficult to assemble the motor; and each set of screws, flat washer , Spring washers, and nuts need to be tightened with an electric wrench, because it needs to be tightened manually by groups, and the force is inconsistent, so the installation accuracy cannot be guaranteed after tightening, so the coaxiality of the motor is not good, and the n...

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problem that when the design of electric motors (especially with 2-pole asynchronous motors) tends towards high power and small volume development, the radial dimension of the motor is reduced, the length of the iron core is increased, the shaft of the motor is more and more slender, and the critical speed of the shaft is reduced. It often becomes the working speed of the motor. Due to the traditional stator structure and assembly, the unilateral magnetic pull of the motor increases, which will cause the deflection of the shaft to increase with the increase of the stiffness of the magnetic pull. The motor shaft is bent and deformed, and the damage to the bearing is accelerated. , causing vibration and noise, resulting in increased loss and reduced efficiency. In severe cases, the stator and rotor may even rub against each other, and the motor cannot rotate until the motor is burned. At the same time, it will cause problems such as increased vibration and noise.

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